Tag Archive for 'Neutron star'

Left: tracks in the STAR detector from collisions of a 3.85 GeV gold beam in the Relativistic Heavy Ion Collider hitting a gold target from the left. Upper right: radial projection perpendicular to the beam. Lower right: side projection along the beam. Image credit: STAR Collaboration.

Physicists Investigate Phase Diagram of Nuclear Matter

Dec 7, 2022 by News Staff

Nuclear matter is a hypothetic substance consisting of interacting quarks and gluons in large enough numbers that the system can be considered infinite. Left:...

When neutron stars merge, they can produce radioactive ejecta that powers a kilonova signal, as this conceptual image shows. Image credit: Dreamstime.

Hybrid Neutron-Star Merger Detected for the First Time

Dec 7, 2022 by News Staff

Gamma-ray bursts (GRBs) come in two varieties, long and short. Long GRBs, which last a couple of seconds to one minute, form when a star at least 10 times...

This Hubble image shows DEM L 190, a young supernova remnant in the Large Magellanic Cloud. Image credit: NASA / ESA / Hubble / S. Kulkarni / Y. Chu.

Hubble Spots Colorful Supernova Remnant in Large Magellanic Cloud

Nov 28, 2022 by Enrico de Lazaro

The new Hubble image shows sheets and filaments of debris from a massive star that exploded as a supernova in the Large Magellanic Cloud, a nearby, small...

Ecker et al. suggest that light (heavy) stars have stiff (soft) cores and soft (stiff) outer layers. Image credit: Peter Kiefer / Luciano Rezzolla.

Theoretical Study Sheds More Light on Internal Properties of Neutron Stars

Nov 15, 2022 by News Staff

Using more than 10 million randomly generated equations of state that satisfy nuclear theory and astronomical observations, astrophysicists from the Institut...

An artist’s impression of a magnetar. Image credit: NASA’s Goddard Space Flight Center / S. Wiessinger.

Distant Magnetar Has Solid Surface with No Atmosphere

Nov 4, 2022 by News Staff

Magnetars are neutron stars with ultra-strong magnetic fields, which can be observed in X-rays. Polarization measurements could provide information on...

An artist’s impression of a jet emanating from NGC 4993. Image credit: J.A. Biretta et al / NASA / ESA / Hubble Heritage Team / STScI / AURA / Sci-News.com.

Hubble Observes Ultra-Relativistic Jet from Neutron-Star Merger

Oct 14, 2022 by News Staff

GW170817, a titanic collision between two neutron stars detected in August 2017, ejected a structured relativistic jet with a speed greater than 99.97%...

This image, taken by the X-SHOOTER instrument at ESO’s Very Large Telescope (VLT), shows light from GRB 210905A (center). Image credit: ESO / Rossi et al.

Astronomers Detect Powerful Blast in Early Universe

Oct 3, 2022 by Enrico de Lazaro

Astronomers using the X-SHOOTER instrument at ESO’s Very Large Telescope (VLT) have detected light from a gamma-ray burst at a redshift of 6.3, meaning...

An artist’s impression of a light hypernucleus. Image credit: Keiko Murano / RIKEN.

CERN Physicists Measure Properties of Hypernuclei

Sep 22, 2022 by News Staff

Physicists from the ALICE Collaboration at CERN’s Large Hadron Collider have precisely measured two properties of hypernuclei that may exist in the cores...

This artist’s conception shows the merger between a neutron star and another star (seen as a disk, lower left) which caused an explosion resulting in SGRB 211106A (white jet, middle), and left behind what astronomers now know to be one of the most luminous afterglows on record (semi-spherical shock wave mid-right); while dust in the host galaxy obscured most of the visible light (shown as colors), millimeter light from the event (depicted in green) was able to escape and reach ALMA. Image credit: ALMA / ESO / NAOJ / NRAO / M. Weiss, NRAO, AUI & NSF.

ALMA Looks at Neutron Star Merger in Millimeter Light

Aug 3, 2022 by News Staff

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have for the first time detected the millimeter afterglow of a short-duration...

This artist’s impression illustrates the merger of two neutron stars, which produces the remarkably brief yet intensely powerful event known as a short gamma-ray burst. Image credit: NOIRLab / NSF / AURA / J. da Silva / Spaceengine.

Castaway Gamma-Ray Bursts Occur in Extremely Distant Galaxies, Astronomers Say

Jul 28, 2022 by News Staff

About 30% of short gamma-ray bursts (sGRBs), which form during the collisions of neutron stars, lack a coincident host galaxy, raising questions about...

This image shows PSR J0952-0607 and its companion. Image credit: W.M. Keck Observatory / Roger W. Romani / Alex Filippenko.

Astronomers Find Heaviest Neutron Star on Record

Jul 27, 2022 by News Staff

PSR J0952-0607, a so-called millisecond pulsar, has shredded and consumed nearly the entire mass of its stellar companion and, in the process, grown into...

The globally distributed dishes of the European VLBI Network are linked with each other and the 305-m William E. Gordon Telescope at the Arecibo Observatory in Puerto Rico. Together they have localized FRB121102’s exact position within its host galaxy. Image credit: Danielle Futselaar, www.artsource.nl.

Mysterious Repeating Fast Radio Burst Has ‘Heartbeat’ Pattern

Jul 13, 2022 by News Staff

A fast radio burst (FRB) dubbed FRB 20191221A persists for up to three seconds, about 1,000 times longer than the average FRB; within this window, astronomers...

An artist’s impression of the pulsar-planet system PSR B1257+12. Image credit: NASA / JPL-Caltech.

Pulsar Planets are Incredibly Rare, New Study Shows

Jul 11, 2022 by News Staff

Pulsar planets are extrasolar worlds that are found orbiting pulsars, or rapidly rotating neutron stars. In new research, Iuliana Camelia Nitu, a Ph.D....

Top left: a giant blue star, much more massive than our Sun, has consumed, through nuclear fusion at its center, all its hydrogen, helium, and heavier elements up to iron. It now has a small iron core (red dot) at its center. Unlike the earlier stages of fusion, the fusion of iron atoms absorbs, rather than releases, energy. The fusion-released energy that has held up the star against its own weight now is gone, and the star will quickly collapse, triggering a supernova explosion. Top right: the collapse has begun, producing a superdense neutron star with a strong magnetic field at its center (inset). The neutron star, though containing about 1.5 times the mass of the Sun, is only about the size of Manhattan. Bottom left: the supernova explosion has ejected a fast-moving shell of debris outward into interstellar space. At this stage, the debris shell is dense enough to shroud from view any radio waves coming from the region of the neutron star. Bottom right: As the shell of explosion debris expands over a few decades, it becomes less dense and eventually becomes thin enough that radio waves from inside can escape. This allowed observations by the VLA Sky Survey to detect bright radio emission created as the rapidly spinning neutron star’s powerful magnetic field sweeps through the surrounding space, accelerating charged particles. This phenomenon is called a pulsar wind nebula. Image credit: Melissa Weiss, NRAO / AUI / NSF.

Astronomers Spot Pulsar Wind Nebula in Distant Dwarf Galaxy

Jun 15, 2022 by News Staff

A pulsar wind nebula is created when the powerful magnetic field of a rapidly spinning neutron star accelerates surrounding charged particles to nearly...

The star-filled sky in this Hubble photo lies in the direction of the Galactic center. The light from stars is monitored to see if any change in their apparent brightness is caused by a foreground object drifting in front of them. The warping of space by the interloper would momentarily brighten the appearance of a background star, an effect called gravitational lensing. One such event, OB110462, is shown in the four close-up frames at the bottom. The arrow points to a star that momentarily brightened, as first captured by Hubble in August 2011. This was caused by a foreground black hole drifting in front of the star, along our line of sight. The star brightened and then subsequently faded back to its normal brightness as the black hole passed by. Because a black hole doesn’t emit or reflect light, it cannot be directly observed. But its unique thumbprint on the fabric of space can be measured through these so-called microlensing events. Image credit: NASA / ESA / Hubble / K. Sahu, STScI / J. DePasquale, STScI.

Hubble Detects Free-Floating Compact Object 5,000 Light-Years Away

Jun 13, 2022 by Enrico de Lazaro

Astronomers have for the first time discovered what may be an isolated stellar-mass black hole using the astrometric microlensing technique. They estimate...

An artist’s conception of a neutron star with an ultra-strong magnetic field, called a magnetar, emitting radio waves (red). Image credit: Bill Saxton, NRAO / AUI / NSF.

Astronomers Detect Repeating Fast Radio Burst Associated with Persistent Radio Emission

Jun 8, 2022 by News Staff

FRB 190520 is only the second example of a repeating fast radio burst with a compact source of persistent radio emission between bursts. An artist’s...

MeerKAT image of the PSR J0901-4046 region at 1.28 GHz. Image credit: Caleb et al., doi: 10.1038/s41550-022-01688-x.

Astronomers Discover Unusual Radio-Emitting Neutron Star

May 31, 2022 by News Staff

Radio-emitting neutron stars are objects with spin periods ranging from milliseconds to tens of seconds; as they age and spin more slowly, their radio...

A section of the Large Magellanic Cloud, captured under normal conditions by SARAO’s MeerKAT radio telescope. It is detecting all radio light, and PSR J0523-7125 looks like just another source of radio light. Image credit: Yuanming Wang.

ASKAP Radio Telescope Discovers New Extragalactic Pulsar

May 3, 2022 by News Staff

PSR J0523-7125, a highly circularly polarized, variable, steep-spectrum pulsar located in the Large Magellanic Cloud, is the brightest extragalactic pulsar...

An artist’s impression of a millisecond pulsar. Image credit: NASA’s Goddard Space Flight Center.

Anomalous Gamma-Ray Signal from Milky Way’s Core May Actually Come from Millisecond Pulsars

Apr 28, 2022 by News Staff

Astronomers from the Australian National University, the University of New South Wales, the University of Canterbury and the University of Tokyo have found...

X-ray spots on the surface of the magnetar SGR 1830-0645. Image credit: Younes et al., doi: 10.3847/2041-8213/ac4700.

NICER Observes Merger of X-Ray Spots on Distant Magnetar

Mar 9, 2022 by News Staff

Using NASA’s Neutron star Interior Composition Explorer (NICER), astronomers have observed the merging of multimillion-degree X-ray spots on the surface...

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